import java.util.Comparator;

public class GeometricObjectComparator implements
  Comparator<GeometricObject>, java.io.Serializable {
  public int compare(GeometricObject o1, GeometricObject o2) {
    double area1 = o1.getArea();
    double area2 = o2.getArea();

    if (area1 < area2) { return - 1; }
    else if (area1 == area2) { return 0; }
    else { return 1; }
  }
}
